Lily is not here now,Can I take a m.
题目
Lily is not here now,Can I take a m.
It's k .......to all that Bill Gates is a famous person all over the world.
答案
Lily is not here now,Can I take a message?莉莉现在不在这里,你能给个留言吗?It's known to all that Bill Gates is a famous person all over the world. 众所周知比尔...
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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